Supercritical water gasification of food waste: Effect of parameters on hydrogen production |
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| Affiliation: | 1. Department of Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China;2. Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China;3. National Experimental Teaching Center for Materials, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China;4. Tianjin College, University of Science and Technology Beijing, Tianjin 301830, China;5. Beijing Building Materials Academy of Sciences Research, State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing 100041, China;1. Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada;2. Department of Chemical and Biochemical Engineering, University of Western Ontario, London, Ontario, Canada;3. Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario, Canada;1. Department of Earth and Space Science and Engineering, York University, Ontario M3J 1P3, Canada;2. Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatchewan S7N 5A9, Canada;1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;2. College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China;3. Institute of New Energy and Energy-Saving & Emission-Reduction Technology, Hunan University, Changsha 410082, China;4. State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China;1. Lassonde School of Engineering, York University, Toronto, ON, Canada;2. Department of Chemical and Biological Engineering, University of Saskatchewan, SK, Canada |
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| Abstract: | Food waste is a type of municipal solid waste with abundant organic matter. Hydrogen contains high energy and can be produced by supercritical water gasification (SCWG) of organic waste. In this study, food waste was gasified at various reaction times (20–60 min) and temperatures (400 °C-450 °C) and with different food additives (NaOH, NaHCO3, and NaCl) to investigate the effects of these factors on syngas yield and composition. The results showed that the increase in gasification temperature and time improved gasification efficiency. Also, the addition of food additives with Na+ promoted the SCWG of food waste. The highest H2 yield obtained through non-catalytic experiments was 2.0 mol/kg, and the total gas yield was 7.89 mol/kg. NaOH demonstrated the best catalytic performance in SCWG of food waste, and the highest hydrogen production was 12.73 mol/kg. The results propose that supercritical water gasification could be a proficient technology for food waste to generate hydrogen-rich gas products. |
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| Keywords: | Supercritical water gasification Food waste Hydrogen |
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